spawn ball + run in set

src/states/linear/components_ball.rs

@@ -0,0 +1,35 @@
+use bevy::prelude::Component;
+use rand::prelude::IndexedRandom;
+
+#[derive(Component, Debug, Clone, Copy)]
+pub struct RoundBall {
+    pub ball_type: RoundBallType,
+    pub track_progress: f32,
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, Default)]
+pub enum RoundBallType {
+    #[default]
+    Red,
+    Green,
+    Blue,
+    Purple,
+}
+
+impl RoundBallType {
+    pub const fn asset_path(&self) -> &'static str {
+        match self {
+            RoundBallType::Red => "sprites/round/red.png",
+            RoundBallType::Green => "sprites/round/green.png",
+            RoundBallType::Blue => "sprites/round/blue.png",
+            RoundBallType::Purple => "sprites/round/purple.png",
+        }
+    }
+
+    pub fn random_from_4() -> Self {
+        [Self::Red, Self::Green, Self::Blue, Self::Purple]
+            .choose(&mut rand::rng())
+            .copied()
+            .unwrap_or_default()
+    }
+}